This is one of the most valuable items in the shack. After the rig and antenna, it is the most valuable piece of equipment - even more so than something basic like a rotator!

It is tricky to set up and also to tune - it can be a curse, but also a blessing!

 How does it work? It captures noise, using a noise antenna, and changes the phase and magnitude so it will cancel out the noise that enters the signal antenna. So 2 antennas need to be used - one to capture as much signal as possible (normal) and the other to capture as much noise as possible (and as little signal as possible)

How does it work?